Rules for this Code Section have been developed considering the
needs for applications which include piping typically found in
electric power generating stations, in industrial and institutional
plants, geothermal heating systems, and central and district
heating and cooling systems.

Piping as used in this Code includes pipe, flanges, bolting,
gaskets, valves, relief devices, fittings, and the pressure
containing portions of other piping components, whether
manufactured in accordance with Standards listed in Table 126.1 or
specially designed. It also includes hangers and supports and other
equipment items necessary to prevent overstressing the pressure
containing components.

Rules governing piping for miscellaneous appurtenances, such as
water columns, remote water level indicators, pressure gages, gage
glasses, etc., are included within the scope of this Code, but the
requirements for boiler appurtenances shall be in accordance with
Section I of the ASME Boiler and Pressure Vessel Code, PG-60.

The users of this Code are advised that in some areas
legislation may establish governmental jurisdiction over the
subject matter covered by this Code. However, any such legal
requirement shall not relieve the owner of his inspection
responsibilities specified in para. 136.1.